CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities
Net income (loss)	$ 49,410
Derivative contracts:
Share-based compensation (equity-classified)	1,700
Cash flows from financing activities
Proceeds received from rights offering, net	100
Cash and cash equivalents – beginning of period	6,761
Cash and cash equivalents – end of period	10,105
Successor [Member]
Cash flows from operating activities
Net income (loss)	49,410
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization	20,886
Accretion of firm transportation obligation	0
Derivative contracts:
Net (gains) losses	(28,077)
Cash settlements, net	(2,458)
Loss (gain) on sales of assets, net	69
Non-cash exploration expense	0
Non-cash interest expense	988
Share-based compensation (equity-classified)	1,694
Other, net	38
Changes in operating assets and liabilities, net	(6,533)
Net cash provided by operating activities	36,017
Cash flows from investing activities
Capital expenditures	(43,583)
Proceeds from sales of assets, net	0
Other, net	0
Net cash used in investing activities	(43,583)
Cash flows from financing activities
Proceeds from credit facility borrowings	14,000
Repayment of credit facility borrowings	(2,000)
Debt issuance costs paid	(1,090)
Proceeds received from rights offering, net	55
Other, net	(55)
Net cash provided by (used in) financing activities	10,910
Net increase in cash and cash equivalents	3,344
Cash and cash equivalents – beginning of period	6,761
Cash and cash equivalents – end of period	10,105
Cash paid for:
Interest, net of amounts capitalized	795
Income taxes, net of (refunds)	0
Reorganization items, net	901
Non-cash investing and financing activities:
Changes in accrued liabilities related to capital expenditures	2,322
Derivatives settled to reduce outstanding debt	$ 0
Predecessor [Member]
Cash flows from operating activities
Net income (loss)		$ (100,739)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization		25,558
Accretion of firm transportation obligation		317
Derivative contracts:
Net (gains) losses		17,267
Cash settlements, net		46,952
Loss (gain) on sales of assets, net		(757)
Non-cash exploration expense		1,713
Non-cash interest expense		22,189
Share-based compensation (equity-classified)		1,364
Other, net		(13)
Changes in operating assets and liabilities, net		31,922
Net cash provided by operating activities		45,773
Cash flows from investing activities
Capital expenditures		(14,575)
Proceeds from sales of assets, net		126
Other, net		1,186
Net cash used in investing activities		(13,263)
Cash flows from financing activities
Proceeds from credit facility borrowings		0
Repayment of credit facility borrowings		(5,468)
Debt issuance costs paid		0
Proceeds received from rights offering, net		0
Other, net		0
Net cash provided by (used in) financing activities		(5,468)
Net increase in cash and cash equivalents		27,042
Cash and cash equivalents – beginning of period		11,955
Cash and cash equivalents – end of period		38,997
Cash paid for:
Interest, net of amounts capitalized		2,765
Income taxes, net of (refunds)		(35)
Reorganization items, net		174
Non-cash investing and financing activities:
Changes in accrued liabilities related to capital expenditures		(10,555)
Derivatives settled to reduce outstanding debt		$ 51,979